Introduction To Electromagnetic Field Theory

Electromagnetic is a branch of physics or electrical engineering in which electric and magnetic phenomenon studied. Electromagnetic (EM) may be regarded as the study of the interactions between electric charges at rest and in motion.


The design of EM devices include transformers, electric relays, radio/TV, telephones, electric motors, transmission lines, waveguides, antennas, optical fibres, radars and lasers.


  1. EMpower in the form of microwaves is used to heat deep tissues.
  2. EM fields are used in the induction heaters for melting, forging, annealing, surface hardening and soldering operations. The dielectric heating equipment uses shortwaves to join or seal thin sheets of plastic materials.
  3. EM energy offers many new and exciting possibilities in agriculture. Example- It is used to change the vegetable taste by reducing acidity.

Written By:

Paramjeet Singh Jamwal, M.Tech Scholar, Sant Longowal Institute of Engineering and Technology, Longowal-148106, Punjab, INDIA, 2013.

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